cli: improve list-builds description
cli: improve list-builds description

jpopelka/osbs-client,jpopelka/osbs-client,vrutkovs/osbs-client,DBuildService/osbs-client,TomasTomecek/osbs,DBuildService/osbs-client,twaugh/osbs-client,TomasTomecek/osbs,projectatomic/osbs-client,twaugh/osbs-client,pombredanne/osbs-client,vrutkovs/osbs-client,projectatomic/osbs-client,pombredanne/osbs-client,pbabinca/osbs,bfontecc007/osbs-client,pbabinca/osbs,bfontecc007/osbs-client